5eaa5fc42eda2ac7988340d23e0ef9d394a8500f4c11c2a0271f0a90516029a3

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
16/05/2024, 19:35

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General

Target

2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe
Size

52KB
MD5

3aa118c7d24c7223448df16220fe0c5b
SHA1

43bd4d447630ffaca5de6726b2bf097b4b2253a2
SHA256

5eaa5fc42eda2ac7988340d23e0ef9d394a8500f4c11c2a0271f0a90516029a3
SHA512

626574e31fc2a4f3f254c005a8e4a1efdbff3c9c7c221f8597e04c022f6a7e444d532db73109cd638baf6b46735add6364a4c9ad8bd0195d9918b4c429b0a6bb
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOh:bODOw9acifAoc+v2

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/3028-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001228a-11.dat	CryptoLocker_rule2
behavioral1/memory/3028-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2980-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-15-0x00000000029B0000-0x00000000029BF000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2980-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/3028-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/files/0x000c00000001228a-11.dat	UPX
behavioral1/memory/3028-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/2980-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral1/memory/3028-15-0x00000000029B0000-0x00000000029BF000-memory.dmp	UPX
behavioral1/memory/2980-27-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2980	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
3028	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/3028-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/files/0x000c00000001228a-11.dat	upx
behavioral1/memory/3028-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/2980-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral1/memory/3028-15-0x00000000029B0000-0x00000000029BF000-memory.dmp	upx
behavioral1/memory/2980-27-0x0000000008000000-0x000000000800F000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 2980	3028	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	28
PID 3028 wrote to memory of 2980	3028	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	28
PID 3028 wrote to memory of 2980	3028	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	28
PID 3028 wrote to memory of 2980	3028	2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_3aa118c7d24c7223448df16220fe0c5b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3028
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2980

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
52KB

MD5
cffe293d51e5b544ffdd43ed486de1f3

SHA1
000cc929773bc72624793b8bc5222e849260c61e

SHA256
276df0880c96733c646ce91b50341566cbd3c9a524b7e1bef5fbe44b80240270

SHA512
be275687f6a528b2b827a7ed4caaedc1bb2c431096bc7679d95e7fc15b3574a14381a51fa4ac4bd3bb200cc27ea324961b01338c66b2ced2b9258e4661fb6260

Download Submit
memory/2980-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2980-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2980-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2980-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3028-9-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/3028-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/3028-1-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/3028-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3028-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3028-15-0x00000000029B0000-0x00000000029BF000-memory.dmp

Filesize
60KB

Download